Herb Gross describes two examples of linear relationships and how they arose. The first is Gauss' formula for the sum of an arithmetic progression and the second is the Celsius/Farenheit conversion formula. You will be fascinated by their history and relevance. Herb Gross describes the benefits of self-paced learning of Algebra and stresses the relevance of the topics that are covered in this course. This material and much more is also available online at www.adjectivenounmath.com.